Jump to content

Dan6470

DIY DC Controller - any ideas

Recommended Posts

1 hour ago, Paul_sterling said:

Hi Mike,

 

Yes that is most helpful thank you.

 

Re. the Morley units, i've not heard of them before, are they comparable in quality to the Gaugemaster Units? I must admit, the inclusion/possibility of fly-leads is profoundly helpful. which method of control does it use? as per HM2000 or the Gaugemaster D?

 

Thanks, Paul. 

 

 

 

 

 

 

Hi Paul, the GM and Morley both use full wave transistor control. 

  • Thanks 1

Share this post


Link to post
Share on other sites
9 hours ago, Paul_sterling said:

Hi Mike,

 

Yes that is most helpful thank you.

 

Re. the Morley units, i've not heard of them before, are they comparable in quality to the Gaugemaster Units? I must admit, the inclusion/possibility of fly-leads is profoundly helpful. which method of control does it use? as per HM2000 or the Gaugemaster D?

 

Thanks, Paul. 

 The Morley uses a centre off knob with 150 degrees left travel for one direction and 150 degrees right for the other.   They deliver variable voltage from 0 to about 15 volts, I test LEDs with mine.  Mine isn't a crawler but with a Relco it delivers much better slow speed control than the Merg in the video a few posts before this. The Morley Hand held is fantastic and I have rebuilt mine to be a really handy  one hand operated palm size unit with Stereo jack plugs on a 3 metre extension.   I just wish they did a singe unit, as I invariably twist the wrong knob.

  • Thanks 1

Share this post


Link to post
Share on other sites

If you open the gaugemaster units they have about £1 of jelly bean components that you could knock up in a few minutes , it’s very difficult to see where the cost is. 

Share this post


Link to post
Share on other sites
8 minutes ago, Junctionmad said:

If you open the gaugemaster units they have about £1 of jelly bean components that you could knock up in a few minutes , it’s very difficult to see where the cost is. 

 

It is a fair point, and one my colleague has noted to me. However, building electrical machines is not my hobby, I'm so limited for hobby time as it is, I have to consciously balance time vs spend, and simply put, the diversity of the diagrams on this thread alone, are so vast, that the time required (for me and my limited understanding) to be able to successfully build one of them, or even a copy of a GM controller, its just not worth it. GM and Morley build controllers which (by the sounds of it), meet  my requirements, and are ready to go, at a cost impact yes, but not a time impact. I hope that rabble makes sense haha.

 

Paul. 

 

  • Like 1
  • Agree 1

Share this post


Link to post
Share on other sites

Guys, The GM controllers are solid, really work and more importantly come with a lifetime guarantee, that alone is worth the price hyke.

The Morley is more sophisticated (see my video) has overload protection and now they have the right level of smoothing is bang on for what we need.

 

You have seen my video about making a controller from scratch? There is a lot goes into it time wise.

 

 

 

 

Share this post


Link to post
Share on other sites
On 07/11/2019 at 10:29, mikesndbs said:

Guys, The GM controllers are solid, really work and more importantly come with a lifetime guarantee, that alone is worth the price hyke.

The Morley is more sophisticated (see my video) has overload protection and now they have the right level of smoothing is bang on for what we need.

 

You have seen my video about making a controller from scratch? There is a lot goes into it time wise.

 

 

 

 

 

Hi Mike,

 

I watched your videos in relation to the Zero Two, both very helpful. Did someone really suggest your videos resulted in Layoffs? a bit extreme. 

 

 

Question I was going to ask, 18 months on from that, does anyone know if the Morley Crawler does limit top speed, or have they done something clever to preserve that whilst offering crawler control? I'm guessing the former, simply because I believe if they created the latter, it would surely make the standard zero three obsolete?

 

Cheers, Paul. 

 

 

EDIT - Spoke to Morley's yesterday, and I can confirm that the Crawler does not limit top speed. 

Edited by Paul_sterling

Share this post


Link to post
Share on other sites
On 07/11/2019 at 10:29, mikesndbs said:

Guys, The GM controllers are solid, really work and more importantly come with a lifetime guarantee, that alone is worth the price hyke.

The Morley is more sophisticated (see my video) has overload protection and now they have the right level of smoothing is bang on for what we need.

 

You have seen my video about making a controller from scratch? There is a lot goes into it time wise.

 

 

 

 

No reason why the GM shouldn’t be “ solid “ it’s essentially a series pass emitter follower with In  some cases simple poly fuse protection, the 50 hz full wave rectification provides a degree of pulsing virtually as an aside 

 

 

Edited by Junctionmad
  • Like 1

Share this post


Link to post
Share on other sites
3 hours ago, Junctionmad said:

No reason why the GM shouldn’t be “ solid “ it’s essentially a series pass emitter follower with In  some cases simple poly fuse protection, the 50 hz full wave rectification provides a degree of pulsing virtually as an aside 

 

 

 

100 Hz but agree they are simple but then maybe that is all is needed?

  • Like 1

Share this post


Link to post
Share on other sites
6 hours ago, mikesndbs said:

 

100 Hz but agree they are simple but then maybe that is all is needed?

50Hz before rectification is the  normal nomenclature 

Share this post


Link to post
Share on other sites

After full wave rectification the DC wave will be 100Hz, that was what I was referring to, 100Hz seems to produce a good balance between control and noise. Tried 500Hz and my how those locos sing lol

Share this post


Link to post
Share on other sites

Someone needs to whip the casing off the crawler and post some photos. I asked Morley a while back and didn't much gen :banghead:

  • Like 1

Share this post


Link to post
Share on other sites
12 hours ago, maico said:

Someone needs to whip the casing off the crawler and post some photos. I asked Morley a while back and didn't much gen https://www.rmweb.co.uk/community/uploads/emoticons/default_dash1.gif

 

Agree fully, I have been told its simply the modification I suggested, exactly it would seem, but would be nice to know.

  • Like 1

Share this post


Link to post
Share on other sites
1 hour ago, mikesndbs said:

 

Agree fully, I have been told its simply the modification I suggested, exactly it would seem, but would be nice to know.

 

I spoke to Morley a couple days ago, and the crawler doesn't have a reduction in top speed, so I think it may be a little more than your (very clever) mod Mike. 

 

Paul. 

  • Like 1

Share this post


Link to post
Share on other sites
1 hour ago, Paul_sterling said:

 

I spoke to Morley a couple days ago, and the crawler doesn't have a reduction in top speed, so I think it may be a little more than your (very clever) mod Mike. 

 

Paul. 

 

Hmm interesting, yes I suppose the extra cost has to be justifiable, hope someone posts an internal shot soon then

Share this post


Link to post
Share on other sites
On 07/11/2019 at 16:04, Paul_sterling said:
 
 
 
1
On 07/11/2019 at 16:04, Paul_sterling said:

 

Hi Mike,

 

I watched your videos in relation to the Zero Two, both very helpful. Did someone really suggest your videos resulted in Layoffs?

 

 

Don't worry, electrickery skills are in demand

GGMBRD.jpg

Share this post


Link to post
Share on other sites

I'm guessing this is the Wireless World article people keep referring to -

The magazines are in a public archive so I don't see a problem providing a link to that?

 

See page 30 of the PDF (Page 333 as shown on the original pages).

https://www.americanradiohistory.com/Archive-Wireless-World/70s/Wireless-World-1972-07.pdf

 

The full archive of WW is here, just to give proper credit to the site:

https://www.americanradiohistory.com/Wireless_World_Magazine.htm

 

  • Like 3

Share this post


Link to post
Share on other sites

That WW article is the one I used all those years ago, and still use today.

 

Stewart

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.